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10th Class Mathematics Statistics Question Bank Statistics and Probability

  • question_answer
     
    Factory A Factory B
    No. of wage earners   250 200
    Average daily wage   Rs. 2.00 Rs.2.50
    The average of daily wages for the earners of the two factories combined is

    A)  Rs. 2.12

    B)  Rs. 2.06

    C)  Rs. 2.20  

    D)  Rs. 2.22

    Correct Answer: C

    Solution :

     Required average \[=\frac{250\times 2.00+200\times 2.50}{250+200}\] \[=\frac{1000}{450}\] \[=\frac{20}{9}\] \[=Rs.2.22\]


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